1. Rude complaints about a brand or service. As mad as you might be that you only got five nuggets instead of six, do your followers really need to know? If you are going to complain, find the customer service number or email address.
Most large brands have a customer service account on Twitter, so if you’re having no luck via email, then send a polite tweet explaining the issue or letting them know you’ve sent an email.
You never know, you might want to work with that brand later on down the line. Keep it classy.
Phoebe Parke 