As a general rule, you shouldn't sit on tables. That's what chairs are for, and nobody wants to be That Guy Who Broke The Table. Sometimes, though, there's nowhere else to sit and you have to take a calculated risk, based on how sturdy the table looks and that test where you push it with your hand and think, yeah, this is a pretty solid table.
In the case of this table made out of recycled table legs, however, please don't sit on this table. Also, maybe don't put anything on it, either.
· Eking it Out table is made out of recycled table legs [Inhabitat]