The point that was made about hearing competitive players call casuals scrubs is completely void as i can guarantee that the terms "tourney-***, exploiter, cheater etc" are used far more often by the casual players to attempt to insult the competitive ones.
The main problem with most of these types of threads, and really the attitudes of a good number of the casual players who began frequenting these boards since the hype about brawl began, is that they for whatever reason illogical believe that what competitive players do at tournaments somehow affects them. I really cannot understand how this idea came into being, but it is extremely popular these days it seems.
Now if i was just a casual player, and I never planned on going to a single tournament, why would I care if every single tournament player used fox (which is completely false, but it has become popular among those who visit 4chan), played every match on final destination (also false), and never used items. How would that affect me in the slightest? Honestly that would be like someone who personally does not like milk having a deep grudge against cows somewhere on the other side of the planet simply because they bear milk. The cows have absolutely no affect on said "milk-hater", yet this person rants and raves on forums and in public incessantly because they have somehow been offended by the cow. Its ludicrous.
Now I am a reasonable person, so I can understand some casual players getting upset if a more competitive player (or group of them) was to show up and beat them in their own casual tournament. However, since these casuals neglected to clearly explain their rules, there is nothing that can be done about that specific incidence. Now if it really bothered them that much, for next time they should elaborate and clearly say, "no wave dashing, no short hopping etc." Just as how more competitive tournaments clearly state, no items, certain stages banned and the such. It is not unreasonable to ban techniques, stages, items, play styles etc, if the people running the tournament are in agreement. Just as how most competitive tournaments have banned certain tactics like wobbling, there should be no issue with others banning wavedashing if that is there prerogative. Basically, its up to those involved to decide what they want, and no one else should get involved as they can simply go elsewhere if they do not like the rules.
Personally if I was those high schoolers and I saw that article, I would go to the next one, use 0 advanced tactics (including short hopping apparently) and beat them anyway. The reason why i think they would likely win anyway is because in order to be classified as competitive they have likely spent much more time on the game than the casuals, so even without wavedashing and the such they should have a pretty good advantage just because of time played. I don't mean this as in they should go and gloat and be elitist, I simply think that these casual guys should see that there is more to the average competitive player than simply "broken tactics" and "exploits".
O and as a preementive strike, because i know this is likely to happen, I happen to be a Huge Tourney-***.