There is currently a stat list for "The top X blocked ad domains were" which will show malicious site access attempts on a global level. The "Top X domains for top X clients" list will show the top domains per client whether they were allowed or not. The only modification i could see which might help
@Wutikorn case, is to perhaps include an option to filter the per client list to only show the blocked domains. This would reveal more detail for blocked sites with lower hits, which may not be sufficient to make it to the "top X" in normal circumstances ( below even top 30 ranking). Another "have the stats your way" option which may seem easy in principle, but maybe a bitch to code........ don't know how much interest an option like this would have. Thoughts guys/gals?
Edit: Another alternative might be separate Top X (allowed) and Top X (blocked) lists per client.