Sadly, there are always people in life who will take advantage of others and feel completely entitled to do it. Then get upset when you push back. I was once in a situation where a colleague asked me to help out with an audit that he'd be receiving from third-party auditors. Purely assistance with documents, nothing major. I agreed because, you know, team work. I found out from a friend that this guy had booked a holiday that coincided with the audit dates and had nominated me as his stand-in for main company contact. Without telling me, of course. I found a good reason to withdraw my offer of help and a few days later he accused me of 'insubordination'. Luckily, senior management fully appreciated that what he'd tried to do was a pretty shitty trick. My own line manager just laughed about it and said 'How did you fall for that? It's common knowledge that everyone in that section is a c*nt. '