There are many activities (like gangsters'), such as summoning someone with a hidden reason, intimidation like 'Fall into the pits of hell', stalking, justification of use of physical forces (inducement surrounded by a group, violent abduction and captivity, etc.) and so on, which have become social problems.
目的を隠した呼び出しや「地獄に堕ちる」などの脅迫、ストーカー、物理力の行使（集団での取り囲みによる勧誘、暴力を伴う拉致や監禁等）を正当化する等、社会的に問題となっている（暴力団に近い）行動が多い。