i -think- (correct me if i'm wrong someone) that the point of @invis is for those moments where you really want IC to stay IC. i'm not saying that people should stay @invis for the entirety of their chars lives though.
i use @invis only when i don't want someone going @who then 'who'. seeing me on @who, not seeing me on 'who,' and jumping to the conclusion, "she's doing something sneaky!"
on one hand it's nice to know who's online so you know in advance that there's someone to play with. (i DO use @who to judge if i want to play/or what i want to do… with a small player base it's a given) on the other hand there are moments where it adds a level of mystery to who you will run into. just like walking down a street would. sometimes running into chars that arn't on the @who throws a fun twist in RP.
say Bob the goat ninja is in hiding from Susan the koala fluffer because he fluffed her prized koala...
knowing how people think... sometimes... if susan can't go @invis then bob will simply check the @who for the right time to go out and avoid the consequences of his fluffing for a long time. this isn't the same as avoiding Susan using IC knowledge. It's avoiding Susan because of something OOC.
@invis when used well is a good tool. just like anything.
*shrug*
i�ll go back to the koalas now.