乍沒見大家說倒垃圾的清潔工的壞話?!
A HR director talked about this kind of gossip with me a while ago. the HR director said, " I can't control what they are saying."
If you have hard evidence, pls make it big.
if not, tell youself the 1st sentence.
and when you become their boss later, you would know who should be in layoff list easily.:-)