If you are getting carried through content and only healing when someone is below 50%, and otherwise doing nothing, I am going to vote kick you. The DPS and Tank are not there to do all the work to get Healers through the easy content. DPSing as a healer is being a team player and reducing the amount of damage your team takes.

Not playing as a member of the team is an dick move and will get you kicked from my parties.
Like previous post said, its all depend on the community. 70% of the time i play as healer i always lean toward "lazy" healer as in heal only and only dps occasionally, and so far i never get booted, in fact half the time the party (especially the dps) just leisurely chatting with me or doing stupid stuff (dance emote, circle jumping, memes etc)

i guess i got lucky with my server