ruling in writing arabic in different forms (e.g. when sending message), for example: إن شاء الله ا ں سا ا للـہ ا ىــ ـــــــا ا للــہ سبحان الله سبحٰن الله ــــٮحں ا للـه (no dots, like how Arabic used to be written) is this sinful?

Ustadh AbdulAziz al-Haqqan

No it is not but better to stay away from so that ppl understand.