well i guess no one knows for sure what the ps3 records etc, guess there is some log what "games" you ran, that would be game id etc, dont know if there is any log for just running the jailbreak, if i have to guess (NOT SURE IN ANY WAY, JUST TALKING OUTTA MY ASS HERE) if you havent ran a single homebrew at all or even ftp server and did not log in to PSN, i would say the chances are slim that you is going to get banned, but as i said i cant be sure, imo no one can.
Your safest shot would be to make a system restore on the console, but be aware that you will loose all data then, i dont know if using the backup options on the ps3 "backup" the log files from jb etc,.
as i said no one know as there hasn't been any case that i know of anyone being banned yet for using jailbreak.
and still no one knows how they will ban the consoles either, i guess they ban internet (PSN) access so you would still be able to play games, be aware noone knows how they ban consoles, but my guess is that they wont disable youre console in any way except PSN/online play, i do remember when MS did disable harddrive thingie they had to release a patch enabling it again ^^
REALLY SORRY IF ITS AN COMPLICATED ANSWER, BUT I DONT WANT TO BE HELD RESPONSIBLE IN ANYWAY IF YOU/PEOPLE DO GET BANNED, AS IT ISNT FULLY KNOWN YET HOW/WHAT/WHERE LOGS ETC IS SAVED ON THE PS3 AND CALL HOME WITH THE INFO.
Good luck m8