Depends on the situation.
If theres one odd thrad about the same topic, a month or more old, an dyou'll get accused of necro'ing (which is funnily not popular either) for posting in tha ttrhead instead then it's stupid.
If it's cause someone for the 10'th time of a given week posts a trhead about zombie apocalypse or other eternal repeat threads, the "where would you go"/"what weaponwould you use" ones, not original ones like "whos living corpse would you fuck if you got teh chance at Z day". then fire away.
Or if it's a thread on some recent stuff like teh release of a game, where theres often several threads on page one at teh same time, like MW2 vs BFBC2, or GoW rip-offs or prototype/infamous threads before that. Then fire away as well.