First, is it Stealth Rock, or Stealth Rocks, because seeing the latter used again and again is just ughhh OCD kicks into gear?
Ummm... one thing to point out, I'd really wish people would stop bandwagoning on "if Stealth Rock were gone, then XYZ Pokemon (like Articuno and Moltres) would instantly be viable in OU", because that's complete theorymon. They do have their useful qualities, but I doubt Stealth Rock is the entire reason they're in NU. Things do hold them back, such as low speed and their weakness to common attacking types. I doubt the community wants to go through the hassle of a suspect test just so people can use Charizard and Moltres, because as stated before, we must keep in mind the radical changes that would happen to the metagame. Before you say I'm afraid of change though, I see nothing wrong with moving from pure theorymon to testing a ladder without Stealth Rock, because we could end up with a better metagame (who knows?).
However, am I the only one that really appreciates the chip damage that Stealth Rock provides? It's incredibly useful in battle and provides a whole nother dimension to calculations, in that you need to take in account the limits of how much damage a Pokemon can sustain and how many times they can switch factoring Stealth Rock damage. I don't understand why putting Pokemon on a time limit through Stealth Rock switches is bad; Spikes does the same thing, but is discriminatory to all grounded Pokemon. Furthermore, it was argued that Stealth Rock deals massive amounts of damage, something like 200% a game. Keep in mind that not every Pokemon is neutral or weak to Stealth Rock, and passive recovery in Leftovers and recovery moves (eg Recover, Roost, etc.) probably heal more damage than is inflicted by hazards. Lastly, though it can be argued that Stealth Rock is discriminatory towards types, is that necessarily a bad thing? Types were inherently created unequal anyway, and it doesn't really inhibit teambuilding in that no good teambuilder would stuff their team full of Pokemon weak to Rock anyway. Also, the Pokemon moved to lower tiers "due to their Stealth Rock weakness" are generally outclassed, as Stealth Rock-weak Pokemon exist in the higher tiers as well.
One last additional thing, people keep claiming that Stealth Rock is overpowered because it only takes one turn to deal consistent damage or have a lasting effect, but that one turn / multiple turns (if the opponent has a spinner) could be used to do other things. If you have a free turn, you can set up in a variety of ways; Dragon Dance, Substitute, Thunder Wave, all which put you ahead in a major way. So I'm sort of on the fence if this is truly a powerful argument for banning Stealth Rock.