I'm bored waiting for my client to update and I'll give my $0.02 on the matter.
Yes.
ok, I'll elaborate. They are obviously based on cats, and given the fact their features can move (i.e. their ears and tails and such) it is obvious they have a muscle-structure like a feline, they also must have a simialr circulatory and nervous structure. Logic says that they shoudl purr.
I also agree that they've evolved beyond it, but I do think they woudl be capabe of hackign up hairballs... cant immagine a circumstance where tehy'd get that much hair injested but...
Somone mentioned fish and catnip, Fish simply are a greatly enjoyed dish, much like humans tend to overall really enjoy icecream or chcolate or pizza. Catnip is a mild drug similar to tabacco or possibly more on the level of marajuana (if you watch a cat IRL given catnip tehy always melow out after tehy go balistic a minute or two, and some cats dont even go balistic, just get mellow (I have had 2/6 cats like this)).
Most of the time things get over-exadgerated either by the RPers or by the people who are reporting the activity to the forum.
Personally I like to see occasional use of cat bodylanguage or purs, hisses, etc denoting mood. I agree is somone is running around doing it absolutely randomly and basically beign a bother then they shoudl be told to calm it down, but otherwise I see no real problem with it... and if it bothers you, react to it, tell them they're bothering you or even challenge them to a duel. Tehy may stop or if tehy fight you you can send them to the death realm for a while and not be bugged anymore! (I dont see why people must take this to a GM when it can be resolved quite easily in RP...)
Just my $0.02, spend it wisely!