hey, Is it possible to downgrade a site by spamming its backlink structure by using xrumer,scrapebox or snuke? (In that case by any blackhat method) I would love to know your insights on this.
IMO its a complete waste of your time, because if that is the case anyone can spam the heck out their competitors websites. If the site is old or well aged, have some authority then it doesn't even matter. But yeah a fairly new site can be bombed with that, but then a new site can not be taken as your competitor and doesn't make sense wasting your time.
At the end of the day you cannot control it so why worry about it. Just focus on building quality links to your web sites.
This is illogical for google to rate it negatively and mark it as spam as initially any of your enemy can f**k up ur website if he knows ur url. Google should just rate this kind of spam link building as null value and not in a direction to bann this website ....
Google won't penalize you for having links link to you, you will only get penalized if you link to the bad sites, otherwise competitors would just be linking bad sites to your site and penalizing you.