1. A system comprising: a processor configured for spam detection within a tagging system, wherein the processor is configured to initiate executable operations comprising: evaluating each tag in the tagging system using a spam filter with at least one spam filter criteria; assigning negative points to each tag which matches one of the at least one spam filter criteria; evaluating a tagger's behavior using a tagger filter with at least one tagger filter criteria; assigning trust points to the tagger if a tagger's behavior matches one of the at least one tagger filter criteria; restricting a tagging functionality of the tagging system for a tagger if a first predefined threshold of negative trust points is exceeded; and disabling the tagging functionality of the tagging system for the tagger if a second predefined threshold of negative trust points is exceeded.