They are small.

The Good Part
*They look perfectly Innocent.
*They enjoy light places.
*They are quaint.
*They can not walk quickly.
*They have pretty colors.
*They do not make loud noises.
The Bad Part
*They have too many legs.
*They taste very bad. 
*They have an annoying habit of getting in your mop water.
*They stink... Badly.
*They can, and do, fly.
*They make small and irritating tapping noises.
*I can see 20 of them by simply looking to my right. (Yes, I counted.)
*I am tired of picking them up, sweeping them up, mopping them up... And any other manner of getting rid of them that you can think of. I left one at the bottom of Gladys' stairs last Friday because I was overcome with Dislike for those Things, and could not muster the courage to dispose of even one more...  I will get it next time I clean... Providing that it is still there and Joe has not squished it and dropped it into the trash can... He probably will have. And I shall be Profoundly Grateful to him.