Time will not be wasted on them - generally they're not worth the symptoms they bring about - but here are two brief warnings on the all-too-common sycophant. Also known as the kiss-ass.
Do not directly watch this act, as witnessing a person kiss another's ass causes symptoms resembling food poisoning.
In general, this population of individuals - unfortunately, a very large subspecies of the Homo sapiens race - get far. But only for a while. Until you puke on their shoes.