gossipThreshold is the score threshold below which gossip propagation is supressed; should be negative.
graylistThreshold is the score threshold below which message processing is supressed altogether, implementing an effective graylist according to peer score; should be negative and <= PublisThreshold.
opportunisticGraftThreshold is the median mesh score threshold before triggering opportunistic grafting; this should have a small positive value.
publishThreshold is the score threshold below which we shouldn't publish when using flood publishing (also applies to fanout and floodsub peers); should be negative and <= GossipThreshold.
acceptPXThreshold is the score threshold below which PX will be ignored; this should be positive and limited to scores attainable by bootstrappers and other trusted nodes.