We've never had the problem with this type in our RPs. Probably because we put considerable effort into reviewing character sheets first.

Sometimes PCs who are clichéd can fit very well in, but unless the setting is a modern one with slightly nerdy tendencies involved, pointing out that this PC fulfills this or that trope or cliché simply won't fit if done IC. We couldn't care less what tropes people point out about PCs if they do it OoC, though.

For us, its typically more of a problem with a player or two each RP who build a Mary Sue, but thats another discussion.