If it's crossing your boundaries to allow another person to live their life, you are the one who is wrong. Personal boundaries aren't about someone else, they are about you and your self.
Pagans often get into this "we have to be one big, happy, tolerant, anything goes community, with emphasis on commune" type of peer-pressure norm, and anyone who doesn't conform is crapped on, or "not a Real™ Pagan". Sorry folks, but people are entitled to their own lives, space, lifestyles, and opinions.
So no, you don't get to:
- Walk into my kitchen and judge the food in my cupboards, especially against some boycott list.
- Police my weight, or how much you think I eat, or whether you think I'm "healthy".
- Express displeasure with the car I drive, or criticize whether I walk, bike, transit or drive to work.
- Push to know what work I do, how much I get paid, or what I do with the money I earn.
- Lecture me about my fashion sense, or lack of same.
- Wheedle me to have sex, especially with you, because you've decided all pagans must be "Sex Positive™", which you think means fucking all comers on demand.
Boundaries, then, are how we enforce our personal sovereignty over our own bodies and lives. They are an extension of the concept of personal space, and govern what others can to with regard to you. They don't give you permission to stomp on others. You can't say that someone refusing to have sex with you "violates" your "boundaries". Boundaries are ultimately the right to say no.
Now, when I do a "woo" working, I set boundaries to my working space. Again, so no one interferes with my working. If I'm with a group, the group is included in the boundary. This type of boundary keeps things in and out. Good fences make good neighbors and all of that.
Groups, too, have boundaries between themselves and outsiders. If your personal boundaries and the boundaries common with the group don't mesh well, and the group "norms" trample on your boundaries regularly, that group is wrong for you. If everybody's boundaries are regularly trampled, the group is just plain toxic.
Part of proficiency in magic(k)al work is knowing your own boundaries, and being willing to enforce them. While the later sometimes is easier said than done, it is needed to develop a strong will and sense of self.
Bonus exercise: Take a piece of paper, or a text editor, and write down as many of your boundaries as you can think of. Be as subtle or broad brush as you like. Think on how you enforce those boundaries, and who has exceptions to them, if any.