I'm in team Valor as well. In the same condition at raid, I can only see in total of 4-5 trainers from team Valor and Instinct among 20 trainers.
As @Elderscroller said, Ingress players are able to switch teams. Why Pokemon GO can't!
On the other hand: According to one of the Hong Kong youtuber said, most of the spoofers are in team Mystic. If he is true, then team Mystic is a spoofer-dominated team, as spoofer are a kind of group always take advantage from tiny things. They will mostly choose team Mystic as it has got 49% of all trainers (stats taken from GO Hub)which is the best team. So I just saw you guys discriminating spoofers and called them 'fools'. If not, that the one who are working so hard to ensure the game is fair are 'fools'?
@Thorend please don't blame me with my idea on adding new teams.
Sorry that @Law2010 I'm not stand by your side this time.
(Yoshi maybe dead)