Has this actually ever happened to you?

It should be pretty rare so long as you don't use a really obvious code, since doing it manually is pretty slow - each try takes a second or so to input. bureaucracy managed it by accident once and promptly deleted all the contents he couldn't loot, bless him.

A macro isn't going to make it much faster since you are limited by the speed of the UI.

It would be cool if successfully cracking a code flags you for pvp, or if you make more than 15 unsuccessful attempts. Making it at least 15 would make it harder to trick people into flagging by giving them the wrong can codes.

A pvp flag will prevent them docking up until the flag runs out. Get your combat-specced corp mates to run to the rescue. Or if they can't do that simply yell "flagged sequer at x location" in general chat and I'm sure someone will be delighted to run it down.

Could start some massive pvp fest on alpha, which would be awesome.

And if the flag is for unsuccessful attempts, then this will probably stop people making more than 15 guesses anyway.

I actually like the security code feature, I think it's a nice touch of realism without seriously harming anyone's game play. Except for the unfortunate owners of the can that bureaucracy happened to wander across in his travels.

It would be a way for the people who are currently trying to crack your cans to grief noobs instead. Think of all those trial players promised free stuff, led to a can, and given the wrong can code...it would be so easy to make them enter it wrong three times. Then boom, blown up noob.

This is why I feel 10 or 15 would be a better compromise.

I've cracked a can once, someone harvesting near where I was mining.  It was a BLOOD can and I've been working with a corp aligned with Domhalarn so I didn't steal any of his triandlus though.

I usually try a can a few times as I'm running by usually but I don't go out of my way for them.

10 tries = pvp flag seems like a good idea, certainly would add some alpha spice; albeit rare.