I have been pondering this further and have rationalised my train of thought. My reasoning might be very deeply flawed, but is as follows...
1. If I were to hold a signal strength meter within an inch of my WiFi AP’s Antenna, it would read quite a high signal. The radiated signal is tiny on the grand scale of things but at a one inch distance, inverse square law acts in my favour.
2. If I were to hold the same meter in fresh air, a few miles from a massively powerful transmitter, it would read less high than in (1), because inverse square law would massively diminish the signal strength.
3. If I were then to measure the reflected signal from a surface positioned as in (2), the reflected signal is likely to be very much weaker again than the original signal seen by the meter. This makes me think that the desired reflected signal seem by the radar tower would be much weaker than the unwanted direct signal from my WiFi, tiny as it is.
I therefor conclude that the signal from my WiFi would strongly “dazzle” the radar tower, swamping the desired reflected signals.
But I may be wrong, maybe spectacularly so. I vaguely recall we have at least one radio Ham among our members? Don’t recall who that is but if he sees this thread, his contribution might be interesting...