I agree with Zai. First of I don't mind is someone uses an alt that isn't really trained for RP purposes, but then it should only be used for this purpose and should really be an alt.
If you plan on playing the character more often some training should be put into the person aswell.
Anyhow my main problem isn't people playing themselves stronger then they are within the possibilities. It the one that desolve knives with a smile. That effortlessly beat you in any kind of speed eventhough you have max agility, that will always beat you in armwrestling eventhough your strength is maxed.
The powers that aren't supposed to exist in the PS universe. And no not talking about things like lockpicking becuase the skill isn't implemented or breathing becuase there is no skill for that

Just some common sence. A thief should be able to lockpick and anyone should be able to breath [however the Kran might do that]
Those however that can't stay within those limits is what is annoying. That is why D&D and similar games have Dungeon Masters. To say "hello your not a giant you can't lift that much"or "hello you as a player might know that the world is round but these people don't know it isn't flat". People need to be their own DMs now and apparently not everyone is able to do that.