Q. Is it correct for Frum people to leave a discarded toilet for street collection sometimes for more than a week, when the neighbors are people who often learn Torah and also say words of Tefila as they walk in the street where that toilet is?
A. On question 3309 regarding someone facing in the street or his window a construction portable toilet, we, wrote: "Although, in the case of the bathroom in a plane we mentioned that Poskim are lenient, in this particular situation Horav Shlomo Miller's Shlit'a opinion is that one should avoid davening or saying any words of Kedusha facing a construction portable toilet.
The above applies even if the walls and door are of two layers, since they are mainly made for the purpose of the inside room and not for any room on the outside, and unlike an airplane, they are placed on open spaces."
Certainly, one cannot think Divrei Torah or recite a brocho when facing a toilet left out for collection and the sight is also annoying and disgusting for most, however Horav Aharon Miller's opinion is that it can be left out for the normal collection time expectancy.
Rabbi A. Bartfeld as advised by Horav Shlomo Miller and Horav Aharon Miller Shlit'a