Our house is currently vacant, but we do have a couple of Nest cameras we've been keeping online to monitor the house.

This evening, the day before closing, the buyer's realtor showed up and let himself into our house.

About a minute later, all of our cameras go offline. Apparently he unplugged our modem/router which allowed our cameras to actually work.

This is the 2nd time this week the realtor let himself in unannounced. But the first time he unplugged our stuff.

Long story short, we find out that the realtor was going to let the buyer into our house to start unloading things into our house, without permission. Luckily our realtor's broker had called him before they actually unloaded. (Our realtor is out of service this week, so she couldn't handle this). He also plugged our router back in. When the cameras came back on we saw our buyer with a trailer parked out front.

What makes it worse, the buyers did ask if they could store things in our house a few days before closing, and we asked if they could simply close earlier instead. They declined and specifically said they wouldn't store any items before closing.

They finally left, but I'm still a lit ticked off. Surely this isn't normal procedure, right? Or am I just overreacting?

Entitlement

You did the right thing. Maybe file a complaint with their realtor's broker after closing.

You aren't overreacting at all. They basically committed a criminal trespass by entering when they knew they were specifically refused permission. Unplugging the camera makes it pretty darn clear they knew it. Get the funding then file a complaint.

Just close your house and get the money. Don't let being aggravated mess up your plans. File a complaint after you've had time to cool off and think about it if you feel the need.

Definitely close, then pursue.

I would think the realtor will get in big trouble with TREC for this. File a complaint with TREC.

https://www.trec.texas.gov/public/how-file-complaint

That's very unethical for their agent. They need to be slapped on the wrist. There are too many agents that do the right thing to keep these asswipes around.

I would file a complaint with TREC after your close. Agents like this won't just "do the right thing" until they start getting punished for these kinds of stunts.

TREC. The broker wont do anything

Just blackmail the realtor. Can probably get some decent football tickets or Pappas dining cards, the equivalent of 2 day's rent.

Ummm No. don't do that. Follow up after closing how you think best.