No, they're not anti intellectual property. They're into making stuff by themselves, often using 3D printer technology, and often with open-source hardware and software. They like to make things they think are cool but may be not viable to make as a traditional product. This may or may not lead to products down the long tail (i.e. niche products whose volume previously would have been too low to justify shelf space). They don't believe everything must be open-source but that paradoxically you often come out ahead by freely sharing your work on websites like github.

I haven't done a survey, but my impression is makers respect IP at least as much as the general population b/c they are rigid about following the rules of giving credit for open-source hardware/software; my perception is they're also reasonably rigid about respecting IP.