Originally posted by normhead heard the guys call each others cameras much worse than an "anchor". It's all part of the fun.
Human dynamics can be difficult. Amongst acquaintances or within an established social circle, a poke such as "Hey, you still shootin' with that ol' P.O.S.? When ya gonna step up to an Instamatic?" can be a friendly part of the activity. Coming from a stranger, though, such a comment could be taken as insulting and rude because the personality is unknown.
Anyways, we've heard of other instances like the OP encountered, and we Pentax shooters are confident in 'our' brand.
As for the "anchor" comment, in hindsight one might say "Sure, Pentax is well known for its water resistance. But not sure its magnesium alloy is the best metal for an anchor."