However, please bear in mind that you don't need to just spend more money or target a larger area to increase traffic — optimising where you're targeting can do the same without spending any more money. You can get quite granular with your location targeting, even excluding specific post codes if for some reason you don't want your ad appearing to those people (and costing you money).
No, unfortunately we can not guarantee that the absolute safety of Google Adsense Traffic. This is because we have seen instances in which websites were penalized for receiving large bulks of traffic (and clicks) to their Google Adsense ads. Therefore, if you use it, we strongly recommend you to use it in moderation and in conjunction with other traffic sources. More information >>