I have a outdoor air quality sensor that spikes for five minutes each day at certain times. I know each day when my neighbour goes out for a cigarette. On a similar note Strava data once gave away locations of military bases.
If you aren't putting in any effort to obfuscate your data you are not doing enough. There is a reason why our VIPs and anti-censors both do it.
Encryption and other privacy tools alone aren't enough. The IETF and others are putting great effort into encryption but not enough here. Recently Google announced MLS support, hopefully as that is adopted you'll see more effort with Pluggable transports and making it easy to hide data over more than TLS.
