Just like any other technique...as long as you don't abuse it, use it where appropriate, and it sounds good, what's the problem?

Take a simple technique like a pick slide. You certainly don't want to that every other bar in a solo! It might be pushing it using it more than once in a single song or solo! :-).

In another forum, a discussion ensued about speed playing vs. slow/"feeling" playing. Folks get their backs up in both camps and it gets ugly quickly!!! Friendly folks all of a sudden turned into demons!

So, you'll get the shredders who will sweep until the cows come home and scoff at the blues players who play slower runs. On the other side, you'll get the blues players who will scoff at the shredders accusing them of wanking.

In both cases, they need to grow up IMHO! Everybody has their style and a way they choose to express themselves on the guitar. A mature player will not look down on any other player because of their chosen style of play.

So in general, there is definitely a prejudice on both sides against varying techniques. Just take it from where it comes...if shredding is your thing and people can't accept it, well too bad for them...as long as you don't put them down for their chosen style of playing.