CK wrote:

I have a Genie garage door opener. It is roughly about 11 years old.
This past weekend I came home and my garage door was wide open. I
always confirm that it is down before I drive away. My neighbor's
garage door randomly went up the day before. Nobody else in the
neighborhood is having this problem. I don't think it is a frequency
problem because of the random times that they were both up.

Is it time for me to get a new transmitter? Any other ideas?

Who's to say?
In 1996 or 7 around the Raliegh or Greenville N C area, I forgot which,
Buicks were having their trunks opened and garage doors and and a bunch
of things, all over were malfunctioning due to Military hijinks.
I was passing through the area going to Jacksonvill N C when all the
Radio stations were talking about it.