Old Top TenTop 10 reasons why you should kill Snarfs. 

Special Mentions: 

They're more fun dead.  Ever try to play soccer using live snarf as the ball? (MC68040) 

Bright red and yellow mean poison in nature. (Alluro) 

Third Earth needs to be introduced to the tetherball... (Alluro) 

Killing snarfs is good for the environment (Jackalmann) 

If I have to eat one more candi-fruit something... (Wdsstck) 

They always insist on taking you to "tea" with the Berbils. (Wdsstck) 

Ever see the movie 'Gremlins'?  'nuff said. (MC68040) 

They smile too much. (Alluro) 

Those pointy buck teeth were created to be plunged into human necks.  The life you save may be your own! (Jackalmann) 

It's cheaper to kill Snarfs than it is to buy earplugs. (Jackalmann) 
They snore. (Wdsstck) 

Because they have connection with a certain trashy tabloid. (MC68040) 

They make the ThunderCats look bad since they have kicked the ass of every villain on the show!! (Alluro) 

      RANKDa Top Ten FROM:
10. Snarfs are freaky. nuff said. (Kazul0509)
9. They make pretty throw rugs. (MC68040)
8. Snarf seat covers and hat bands are all the rage (Jackalmann)
(Alluro also had a similar entry)
7. Psyche-OutAlluro
6. They make great stew (Wdsstck)
(Alluro also had a similar entry)
5. Cuz they're plotting to take over Thundercats show and rename them 
'Snarfs' (MC68040)
4. Too much complaining and whining don't we get that enough from 
Whiddaw?? (PumMyra)
3. Their obnoxious colors scare the real animals (Wdsstck)
2. They multiply...First there was Snarfer, then Oswald and Egbert, then a whole damned VALLEY of them! (Alluro)
1. Cause if you don't kill them, somebody else will. (Jackalmann)