Our group is an interesting dichotomy of folks. Triathletes and not. Honestly, for me, triathletes are a great source of entertainment and fun to pick on when it comes time for anything involving kicking (WITHOUT FINS), stroke (Bk, Br, or Fl), sprinting (kicking and moving the arms at the same time - with intesity - over a short duration), or pushing a lactate tolerance repeat on anything under a 200. I suffer through their distance workouts on Monday, and they flake out when we do stroke on Wednesday and some are brave enough to come in on Fridays for a sprint workout. Tuesday and Thursday are entirely theirs and I don't like showing up since the coaches on these days do not coordinate workouts, so you might see lactate sets two days in a row. I go to another pool for long course work (though those are mostly distance based too - I cannot win!) on these days.
Mentally, I cannot understand how someone can just keep doing the one stroke over and over and over - at least not any more.. I used to swim distance - a lot (16-18K per day in club), so you can count me in those that have immense experience in lots of yards, so when most triathletes go after those extra sets in the end of proactice or gripe about too much rest, I can only laugh about the quality that they must have missed putting into the workout or sets they just did. I have learned that most triathletes can benefit from working every stroke (higher heart rates from different training - improved Anaerobic threshold/VO2 Max), kicking (want to get into the lead pack on that swim without paying dearly for it and strengthen the knees/ankles?), or sprinting (get out fast with less impact too). Of course, consistency is the biggest way to gain, not necessarily tons of yards.
I also do stroke in the lane behind me, though when I am doing IM and they are riding my feet, the breaststroke becomes an "awakening" for many of them as they get my size 12 foot in their _____ (insert body part here).
As with just about any business, money talks, and if the triathletes are footing the bill, so be it, but I cannot just roll with the punches entirely. At least I get some entertainment value out of it :>