I'm an alum and no longer have any association myself (I've even managed to lose myself so they can't call asking for donations). But I have friends still around, including at least one still on the staff.
My impression is that the school, including staff and student body, has a pretty positive view of her.
2011 alum here. When I was a student ('07-'11), Jackson was dislike by many (not all) students, and by some staff (hard to say how much). I was working for the student newspaper when Jackson unilaterally suspended the faculty senate, which created a ton of animosity.
My understanding is that the student opinion of her got better after I graduated.
I'm an RPI alum also, having graduated well before Jackson became president. The few people I know who are still actively involved with RPI don't like her much, and I think the inflated salary is a big part of the reason why. (Of course, most of the people I knew at RPI were malcontents to begin with, so maybe that's not a representative sample...)
Alum here too and like you I've managed to drop off the fund-raising radar. I wish I could say the same about Williams College where I spent my last semester (exchange program) who, despite my protests, seems to regard me as a graduate for fund-raising purposes. Every year I get a new guilt-inducing calendar "gift" in the mail.
My impression is that the school, including staff and student body, has a pretty positive view of her.