Warfare & Tactics

You'll have more time than that. Think about how long it takes to align, accelerate, travel at max warp speed (where applicable), decelerate, and land. From there, you'll have a few more moments before the scanner can scan their probes again, giving them a fresh hit on your location. They'll be able to align in that time and their warp will be pretty short. That's the 5-6 seconds you're thinking about.

Sounds perfectly safe. Not much could go wrong.

No. A fleet member could probe you down and warp an interceptor onto you.

This is done fairly often, probably for a variety of purposes. The basic premise is that a fast ship is ... well ... fast. So if your fast ship is burning in a straight line and someone is trying to probe you, even if they have good probing skills, you will be some distance away by the time they manage to land anyone nearby to try tackle you. In many situations this works, which is why ppl do it, but it works mainly because those trying to catch you either are not very good at this game or they view you as not being worth the effort.

If you do choose to try this then, step 1, do not align your burn towards anything in the system. Usually (but not always) that means burning up or down out of the main system axis. That removes the easiest way to catch you ... to warp to you, usually at range, from the celestial that you are burning towards. Even up or down burners can be caught this way, for example I have above-and-below axis bookmarks in all my home systems ... taken from old anoms or old-style deep-safes.

Now, if you are burning not-towards-anything-in-the-system, the main way of catching you is to simply employ a faster ship ... and assume that you are not actively monitoring your character. Depending on the target ship I refit something small and fast and use my scanner guy to squad-warp me to the nearest probe-scanning 'fix', often doing this in a two-step to make for a relatively short final warp-in. From there I simply burn after the target (if he is fast and switched-on he will often be close to 200km away by the time I land) and tackle / kill him. If he is not AFK then all he has to do is warp away when I land on grid.
If he is not very good then I find I land closer to him, so I can use ships with bonuses for point/web range to catch him rather than a fast little guy.
Also, if he has better speed-related skills than me and maxi-speed-increasing implants, then it's possible that I would not be able to catch him ... but that has not yet been the case.

I have no idea how this burning-away method could be helpful in mission or FW sites, but this method is pretty often practised by people 'camping' lowsec / nullsec systems in fast non-cloaky ships ... mainly in an attempt to taunt the locals I suspect.

It is possible, I do it on a regular basis, but I generally won't bother unless it's at least a T2/faction frig upwards, it's close to home and I'm bored.

Protip: If you burn in an 'empty direction' away from any celestials you cut down the chance of being caught even further. If trying to catch a safed ship that isn't rotating safes I will often probe them & see where they are alligned, warp to that celestial, warp back to the probe result and make a new safe a few hundred km before I land, then warp back to the safe I just made and sit there until the target arrives.

Indeed, I have a rapier with a probe launcher & sebo for that very purpose. Even if someone isn't alligned to anything it is possible, you can use a covops for the initial find, dock, swap ships to rapier, pre overload mid rack, reconnect to probes, warp cloaked to result, wait until target is 150km+ away, allign towards them, reprobe, decloak & instawarp and go for tackle.

Needs a bit of luck but funny when it happens.

You could also be chased down by a combination of probes, dscan and a really fast ceptor/pirate frig