Old Wifi uses a very similar frequency band to microwaves, so you just need to target your neighbors with a modified microwave that is much stronger than your a

Old Wifi uses a very similar frequency band to microwaves, so you just need to target your neighbors with a modified microwave that is much stronger than your average wifi router. What could go wrong? Jamming is probably indeed an option. Illegal, but detecting the source and blaming you could be difficult. There is no technical countermeasure against jamming aside from using a different frequency, which would break any form of wifi.