First off, social media for pest control companies isn't nearly as sexy as social media for a taco stand. So any ideas of glitter and glamor are going to be as helpful as a rainbow colored unicorn. Just wanted to get that off my chest before diving in here.
How I see social media as a pest control guy:
1- Maintaining conversations about interesting pest control subjects.
2- Building relationships with current customers.
3- Building relationships with current employees.
On Facebook after establishing a fan base you can use paid advertising to friends of fans, using fans as endorsements. But don't expect huge returns here. It's more building awareness and trust. You will most likely not see Facebook as a last touch for sales. And it's hard to track the first touch.
Funny videos can build links, but I wouldn't consider them great for building trust. I prefer the class nerd image over the class clown image. Nerds are allowed to make jokes, but your know for being smart, not for being funny.
Lastly, check out http://www.familyownedpestcontrol.org we have just launched this lead sharing network, no cost to you.
And if you want to guest post on blogpestcontrol.com I could probably get you in.