Well its not silent those panels go into MPPTs that produce noise when high amps are flowing through them to charge batteries if they don't direct export , if they direct export then there is noise from inverters to convert DC->AC
for any TLD/ccTLD including .bg if you have a trademark you can get the domain even if its registered by someone else - its a very simple appeal process - Uniform Domain-Name Dispute-Resolution Policy
Doesnt matter if its asymmetrtic or not. You should not be allowed to send egress from prefixes that dont belong to you and that you dont advertise to your upstream. Thats what strict rpf is for. Else you are spoofing.