Personally boundaries can be discovered, expressed and executed without indignation. Learning how not to get caught up in patterns that personally detrimental while minimising unhealthy forms of conflict is an invaluable skill.

Providing technical support is, after all, an optional service. It isn't an obligation that you have to the world simply because you have the capability. People may be able to influence you to provide that support either by providing incentive or by making the experience of giving the favour rewarding in itself. Helping out of a frustrating sense of obligation is a less healthy and to be avoided if possible.