This page aims to give people some advice for tipping bitcoin online
Changetip (https://www.changetip.com/) is a great service that allows integrated bitcoin tipping on many social media sites: Reddit Twitter Youtube Github Tumbler GooglePlus StockTwits
Bitcoin tipping is a new phenomenon and can sometimes be misconstrued as spam. To avoid this, it's best to be aware of your environment. For example, when tipping on certain Reddit thread, it is best to contribute a logical comment along with the tip.
Remember, many people don't "get" bitcoin. There's a chance many people never will, in which case bitcoin becomes more of a backend protocol. Forcing bitcoin into people's faces isn't productive for anyone.