There is no problem, and you do not need to avoid mindreading.
When you mindread, it costs you a certain amount of experience points (that can be reduced by investing in the Mindread skill), which is displayed in the stats as a debt. Any new experience gained from quests or defeating opponents goes to paying off the debt first (several areas in FoV have respawning opponents), and then to raising your experience level. Generally the experience cost is proportional to the reward, so not very useful mindreads (that provide atmosphere or humour) are relatively cheap compared to the experience from opponents in the area, mindreads that get a merchant to drop their prices or an NPC to reveal a storage password for loot are higher, while stat or skill bonus mindreads are fairly expensive (but well worth the cost).
