Overall it is about autonomy and space for essentials. Many missions fail to understand the difference between rules and restricted autonomy . If I have to practically be stripped searched on my way in, have some Nazi overlook me to make sure I do not slip while sitting upright in my plastic chair all night as I await the day I will 'graduate' to the area where mats are (I am referring to 'the Bridge' shelter in Dallas which has a similar courtyard set-up as well as other missions in that area), and on top of all that day labor is nowhere near downtown and I am practically starving while the same security guards who search me make me feel stupid for asking for seconds- then yeah I'm not gonna be friendly and tension will be high. 

If I do not have space to store a bag, access to clean myself when needed, space to lay down and rest, or to sit and simple BE during the day, then yeah- no one is my friend.