Eventually, abuse occurred when the prisoners refused to obey the guards. The guards being the perpetrators of the abuse, which was not condoned, by the other guards. Even the prisoners began to believe that there were real prisoners. So what is the point here? The guards and prisoners behavior changed because they were in a certain situation. Clothes were the main differentiation between each other.
The Murids in Imam Al-Darqawi's (may Allah show him mercy) time used to beg for money to break their nafs. They used to wear the dress of the poor and give the money away in charity to those in actual need. One such murid came forward ready to wear the garb of the poor to earn a living and not break his nafs. This murid needed retraining because begging was not about attaining money it was about breaking the internal state of the nafs. So are you fooled by the outward again?
Sidi Abu Al-Abbas Al-Mursi (may Allah be pleased with him) came to Sidi Abu Hassan Al-Shadhali (may Allah be pleased with him) saying he was going to wear harsh clothing and fast etc. Then Sidi Hassan said, “Come to know (Allah), then be how you wish.” (Hikam Al-Shadhaliyyah number 5). You do not complete tasawwaf by completing your dress sense. Its much more difficult than that! One of the other names of the science of Tasawwaf is tazkiyah meaning purfication. No one seems bothered about removing bad character from themselves but is very concerned about dressing like their Pir.